Mahabharata 12.317.3

तस्मादनिष्टनाशार्थमितिहासं निबोध मेतिष्ठते चेद्वशे बुद्धिर्लभते शोकनाशनम्

tasmādaniṣṭanāśārthamitihāsaṃ nibodha metiṣṭhate cedvaśe buddhirlabhate śokanāśanam

Our plain-language meaning of this verse is waiting for scholar review.